Path: utzoo!attcan!uunet!husc6!bu-cs!kwe
From: kwe@bu-cs.BU.EDU (kwe@bu-it.bu.edu (Kent W. England))
Newsgroups: comp.dcom.lans
Subject: Re: Can ethernet TCP/IP lock up?
Summary: Every net architecture has hardware failure modes
Message-ID: <22765@bu-cs.BU.EDU>
Date: 20 May 88 16:42:52 GMT
References: <299@fedeva.UUCP>
Reply-To: kwe@buit13.bu.edu (Kent England)
Followup-To: comp.dcom.lans
Organization: Boston Univ. Information Tech. Dept.
Lines: 17

In article <299@fedeva.UUCP> wrd3156@fedeva.UUCP (Bill Daniels) writes:
>Some folks in my organization have been led to believe that a "screaming" 
>modem/transceiver can lock up an ethernet by asserting carrier forever.
>Supposedly token stuff like GM/MAP does not permit this. 

	A screaming baseband transceiver can take down a single
Ethernet segment.

	A screaming broadband modem can take down a broadband CATV
network.  MAP runs on a broadband network, using token bus.

	A broadcast medium like Ethernet or broadband CATV can be
disabled by hardware failures in transmitters.  This is independent of
the medium acquisition methodology.  MAP and Ethernet/802.3 are
equivalent in this respect.

	Kent England, Boston University